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FAS2700 - Replacing the caching module.pdf
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FAS2700 - Replacing the caching module
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FAS2700 and AFF A220 systems
Replacing the caching module
The workflow diagram shows you the tasks involved in replacing a caching module.
Replacing the caching module
You must replace the caching module in the controller module when your system registers a single AutoSupport (ASUP)
message that the module has gone offline; failure to do so results in performance degradation.
Before you begin
All other components in the system must be functioning properly; if not, you must contact technical support.
1
215-12718_2019-11_en-us November 2019 Copyright
©
2019 NetApp, Inc. All rights reserved.
Web: www.netapp.com • Feedback: doccomments@netapp.com
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You must replace the failed component with a replacement FRU component you received from your provider.
Steps
1. Shutting down the impaired controller on page 2
2. Opening the system on page 4
3. Replacing a caching module on page 6
4. Reinstalling the controller module on page 7
5. Running system-level diagnostics on page 8
6. Switching back aggregates in a two-node MetroCluster configuration on page 11
7. Completing the replacement process on page 12
Shutting down the impaired controller
You can shut down or take over the impaired controller using different procedures, depending on the storage system hardware
configuration.
Shutting down the node
To shut down the impaired node, you must determine the status of the node and, if necessary, take over the node so that the
healthy node continues to serve data from the impaired node storage.
Before you begin
• If you have a cluster with more than two nodes, it must be in quorum. If the cluster is not in quorum or a healthy node shows
false for eligibility and health, you must correct the issue before shutting down the impaired node.
ONTAP 9 System Administration Reference
About this task
You might want to erase the contents of your caching module before replacing it.
Steps
1. Although data on the caching module is encrypted, you might want to erase any data from the impaired caching module and
verify that the caching module has no data:
a. Erase the data on the caching module:
system controller flash-cache secure-erase run
b. Verify that the data has been erased from the caching module:
system controller flash-cache secure-erase show -node node_name
The output should display the caching module status as erased.
2. If the impaired node is part of an HA pair, disable automatic giveback from the console of the healthy node:
storage failover modify -node local -auto-giveback false
3. Take the impaired node to the LOADER prompt:
If the impaired node is displaying...
Then...
The LOADER prompt Go to the next step.
Waiting for giveback... Press Ctrl-C, and then respond y when prompted.
2
FAS2700 systems: Replacing the caching module
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If the impaired node is displaying... Then...
System prompt or password prompt
(enter system password)
Take over or halt the impaired node:
• For a stand-alone system:
system node halt impaired_node_name
4. If the system has only one controller module in the chassis, turn off the power supplies, and then unplug the impaired node's
power cords from the power source.
Shutting down a node in a two-node MetroCluster configuration
To shut down the impaired node, you must determine the status of the node and, if necessary, switch over the node so that the
healthy node continues to serve data from the impaired node storage.
About this task
You must leave the power supplies turned on at the end of this procedure to provide power to the healthy node.
Steps
1.
Check the MetroCluster status to determine whether the impaired node has automatically switched over to the healthy node:
metrocluster show
2. Depending on whether an automatic switchover has occurred, proceed according to the following table:
If the impaired node... Then...
Has automatically switched over Proceed to the next step.
Has not automatically switched over Perform a planned switchover operation from the healthy node:
metrocluster switchover
Has not automatically switched over,
you attempted switchover with the
metrocluster switchover
command, and the switchover was
vetoed
Review the veto messages and, if possible, resolve the issue and try again. If you are unable to
resolve the issue, contact technical support.
3. Resynchronize the data aggregates by running the metrocluster heal -phase aggregates command from the
surviving cluster.
Example
controller_A_1::> metrocluster heal -phase aggregates
[Job 130] Job succeeded: Heal Aggregates is successful.
If the healing is vetoed, you have the option of reissuing the metrocluster heal command with the -override-vetoes
parameter. If you use this optional parameter, the system overrides any soft vetoes that prevent the healing operation.
4. Verify that the operation has been completed by using the metrocluster operation show command.
Shutting down the impaired controller
3
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